The team filtered Crunchbase Pro for ~10,000 target companies, paid Upwork freelancers about $0.10/contact to enrich four buyer personas per company into ~40,000 rows for about $4,000 total, then ran A/B-tested email sequences through PersistIQ.

“We would get a spreadsheet with 10,000 companies multiplied by 4 roles per company, for something like 40,000 rows”

A year after their first, confusingly-worded Show HN, the team relaunched on HN with plain 'internal tools' positioning, having spent the intervening year talking to customers and finding that internal, CRUD-style tools were the strongest use case for the product.

“We discovered that internal tools (eg. to manage deliveries) is a good use case for a visual programming language like Retool”

David attributes the shift directly to the second Hacker News post itself: within a day the go-to-market motion flipped from an outbound-only model to a predominantly inbound one.

“From the moment we launched Retool on Hacker News, our business basically immediately shifted to inbound”

As inbound signups grew, the team built Slack automations that alerted the whole company in real time whenever a large account was actively using Retool or hit an error, then proactively reached out to debug with the customer inside shared Slack channels.

“they built an automation in Slack that ingested product data and alerted the entire company via a Slack message”

David credits this proactive, real-time customer-success loop with saving a large share of at-risk customers who would otherwise have churned once the product had real bugs and real scale.

“we would have probably lost something like 80% of our customers that initially came through”